As a business analyst, when you are on an engagement, take the time to understand the stakeholders and what their input would be on potential decisions that could be made.
Understanding what decisions may come up and how the different stakeholders would be involved will help in understanding the workings of the organization.
Creating fictitious decisions and then creating a RACI chart for those decisions is an effective exercise.
Not only will you be prepared for potential decisions, but you will also gain insight into the different stakeholders.